Collapsible storage box



FIG. 1 is a perspective view of a collapsible storage box showing our new design;

FIG. 2 is an exploded view thereof;

FIG. 3 is a front elevational view thereof, the rear elevational view being identical;

FIG. 4 is a right side elevational view thereof, the left side elevational view being identical; and,

FIG. 5 is a top plan view thereof, the bottom plan view being identical.

Any broken lines are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a collapsible storage box, as shown and described. 